Custom Button with conditional image and conditional text

I have the following custom QML Button:

import QtQuick.Controls 1.4import QtQuick 2.5import QtQuick.Layouts 1.2import QtMultimedia 5.5Rectangle {    id: ueButton    property string ueText: ""    property string ueIconPath: ""    width: 256    height: 128    signal ueSignalButtonClicked    gradient: Gradient {        GradientStop {            position: 0            color: "#ffffff"            SequentialAnimation on color {                id: ueButtonClickAnimation                loops: 1                running: false                ColorAnimation {                    from: "#ffffff"                    to: "#000000"                    duration: 25                }   // ColourAnimation                ColorAnimation {                    from: "#000000"                    to: "#ffffff"                    duration: 25                }   // ColorAnimation            }   // SequentialAnimation        }   // GradientStop        GradientStop {            position: 0.418            color: "#000000"        }   // GradientStop    }   // Gradient    border.color: "steelblue"    border.width: 1    radius: 4    antialiasing: true    smooth: true    ColumnLayout {        anchors.fill: parent        antialiasing: true        Image {            Layout.fillWidth: true            Layout.fillHeight: true            Layout.alignment: Qt.AlignHCenter|Qt.AlignTop            Layout.margins: 8            asynchronous: true            horizontalAlignment: Image.AlignHCenter            verticalAlignment: Image.AlignVCenter            fillMode: Image.PreserveAspectFit            smooth: true            source: ueIconPath        }   // Image        Text {            text: ueText            Layout.fillWidth: true            Layout.fillHeight: true            Layout.alignment: Qt.AlignHCenter|Qt.AlignVCenter            Layout.topMargin: 8            Layout.leftMargin: 8            Layout.rightMargin: 8            Layout.bottomMargin: 16            color: "#ffffff"            font.bold: true            verticalAlignment: Text.AlignVCenter            horizontalAlignment: Text.AlignHCenter            font.pointSize: 16            textFormat: Text.RichText        }   // Text    }   // ColumnLayout    MouseArea {        id: ueButtonMouseArea        antialiasing: true        anchors.fill: parent        onClicked: {            ueButtonClickAnimation.running=true            ueSignalButtonClicked()        }    }   // MouseArea}   // ueButton

This works fine, but what I want to do now is to solve the following two issues:

1. If urtext is empty, the corresponding text is ignored and the whole ColumnLayout place is reserved for Image.
2. If ueIconPath is empty, the corresponding image is ignored and the whole ColumnLayout is reserved for Text.

How can I achieve that?